6 mm thick chain links made of hardened steel provide additional security. Whether for component securing or for locking your bicycle to a fixed object, TRELOCK plug-in chains are the ideal extension for PROTECT-O-CONNECT frame locks. The practical TRELOCK saddle bag is perfect for transporting locks or other accessories. For example, Trelock additional chains for frame locks can be transported easily with the bag. The surface material is weatherproof and the maximum load is 2 kilograms.